Automatically-threading shuttle for looms



' 1,631,090 May 1927' H. A. DAVIS AUTOMATICALLY THREADING SHUTTLE FOR LOOMS Filed Oct. 26, 1926 {NM A/VENTOR A TTOF? NE Y Patented May 3 1, 1927.

UNITED STATES PATENT OFFICE.

HARRY A. DAVIS, F HOPEDALE, MASSACHUSETTS, ASSIGNOR TO DRAPER CORPORA- TION, 0F HOPEDALE, MASSACHUSETTS, A CORPORATION OF 'AUTOMATICALLY -THREADING SHUTTLE FOR LOOMS.

Application filed October. 26, 1926. Serial No. 144,213.

This invention relates to an automatically threading shuttle for .looms whereln "the shuttle becomes threaded during its 101:-

1 ing movements.

The present invention is a further development of the automatically threading shuttles shown and described in the Stimpson tages'of' the invention as hereinafter described are particularly manifested in the automatically threading shuttles to which reference has been made, some of its features may be utilized in other characters of shuttles.

During the weaving operation as the shuttle is picked the filling thread as it is withdrawn from the filling carrier or. bobbin swirls or takes a generally circular path about the end of the filling carrier or bobbin, and for the best weaving results such swirling or circular path of the filling thread should be about an axis central of the filling carrier or bobbin, otherwise, the thread will draw at times over the end portion of the filling carrier and have imparted thereto a retarding action diflerent from the retarding action at the opposite side or other ortions of the filling carrier or bobbin. ne of the important features of the resent invention consists in means for coning the swirling action 'of the thread about a central axis in prolongation of the central-longitudinal axis of the filling carrier or bobbin, whereby the tensioning effect 'on the thread remains substantially uniform.

In automatically threading shuttles of the eneral type shown and described. in the timpson patents, the longitudinally extending thread assage is rovided with a thread casting evice in t e general form of a scroll extending from a point adjacent the bobbin chamber towards the forward end of the thread passage, and on shuttle threading or the occurrence of an overthrow the thread at times is liable to be caught in the recess between the side wall of the thread passage and the adjacent portionwf the scroll, and another important feature -of the present invention therefore consists in means for obviating this difliculty and the ObJGCtlOIlS incident thereto.

The invention and novel features thereof and new combination of parts will best be made clear from the following description I and the accompanying drawings of one good 7 form thereof. In the drawings:

Fig. 1 is a perspective view of the threading end of a shuttle containing the present invention; I

Fig. 2 is an enlarged perspective view of the threading block or eye detached;

Fig. 3 is an end view of the threading block looking from the bobbin chamber;

Fig. 4 is a block; and

Fi 5 is a plan view showing the path of the t read as it is withdrawn from a shuttle containing the present invention. i

The shuttle l is provided with a bobbin chamber 2 and frontward of the bobbin I chamber the shuttle is provided with a longitudinally extending thread passage through which the thread is drawn through the side delivery eye. In the present instance of the invention the shuttle is provided at its forward or threadingend portion with a threading block chamber 3 in which is mounted the threading block 4 which may be formed as the similar threading blocks in either of the Stimpson patents hereinbefore mentioned. The threading block 4 has a longitudinally extending thread passage 5 which communicates with the side delivery eye 6, and leading from the longitudinally extending thread passage the wood of the shuttle is recessed or cut away as at 7. Extending in a lateral direction relative to the lon 'tudinally extending thread passage is the iread director 8, the end portion of which is provided with a threadcatch 9 which extends closely to the ad'acent wall of the thread leading recess 7. n the present instance the scroll 10 has the downwardly extending portion 11 which passes through a slot 12 m the threading lock and has its foot portion 13 turned laterally in 'the recess at the lower face of the block, the result being that the scroll 10 extends upwardly, laterally and frontwardly in the longitudinal thread passage from a point adjacent the bobbin chamber, the end plan view of the threading portion 14 of the scroll referably being adacent to the transverse y e'xtendingbrldge 15 over which the thread passes on its way to the side delivery eye. v

From the construction thus far described it will be noted that the filling thread a as it is withdrawn from the filling carrier or bobbin 16 in the bobbin chamber will be laid longitudinallyof the thread passage over the bridge 15 on its way to the side delivery eye,"

.. and owing to the tension of the thread as it is laid in the shed, the filling thread a will naturally take a position over the bridge at the side adjacent to the side delivery eye .u on its way thereto, with the result that the filing thread a will swirl or take its curvilinear path about-Lan axis which is not coinci-' ing longitudinally'and centrally of the fill-- ing carrier or bobbin.

. In accordance with the present invention, a thread guiding rib is located in the thread passage between a part of the scrool and the bridge, and its thread guiding edge is in substantial alinement with the central longitudinal axis of the filling carrier or bobbin, with the result that as the'thread is withdrawn from the shuttle during weaving, it will bear upon theguiding edge'of the rib and its swirling action will be confined to an axis in prolon ation of the central longb tudinal axisof t e filling carrier or bobbin.

The threading block 4 has extending therefrom the thread guiding rib 17' which may be appropriately cast with the threading block or formed otherwise to pdo vide a thread guiding edge portion in substantial alinement with the longitudinal axis of the.

filling carrier or bobbin. As shown, the rib 17 projects from one side wall of the thread-- ing block and extends between the front guiding wall 18 of the scroll inwardly of the scroll at a point between such guiding edge and the bridge 15, with the result that the thread as it is withdrawn from the filling carrier or bobbin will take a swirling path in prolongation of the central longitudinal axis of the filling carrier or bobbin.

The efiect of this is indicated in Fig. 5 wherein Lhe filling thread a leads from the filling carrier or bobbin 16 over the thread guiding portion of the rib 17, and since the thread guiding portion of the rib 17 is in alinement with the central longitudinal axis ing action of the thread will be confined-to a path central of the filling carrier or bobbin and be directed to the bridge15 on its way to the side delivery eye with unvary'lng tension.

The rib 17 extends from the top portion of the threading block in a downwardly and inwardly curved direction, as indicated at 19, to a point substantially in the longitudinal axis of the scroll, and joins the lower wall 20 'b of the filling carrier or bobbin, the sWirlof the threading block. The downwardly and inwardly inclined portion 19 of the rib 17 is utilized to prevent the thread being caught in the recess 21 between the heel portion of the scroll and the adjacent side 'wall of the thread passage, as indicated in Fi 3. a liould a loop or overthrow occur during weaving, or should the thread en age the top of the scroll on the first pick oi the shuttle following replenishment, the upper inclined portion 19 of the thread guiding rib will prevent the thread from being cau ht between the scroll and the adjacent side wall of the longitudinally extending thread passage.

For the best' results, the thread guiding rib 17 is located between the guiding edge 18 of the scroll and the bridge 15-, but the invention is not necessarily restricted in this respect, the essentials being that the thread guiding edge of the rib be extended substantially to the longitudinal axis of the scroll between the bobbin chamber and the bridge over which the thread passes to the side delivery eye, whereby the lateral pull on the thread through the side delivery eye will not disturb the axis of the swirling'action of the thread during weaving.

What is claimed is:

1. An automatically threading loom shuttle having abobbin chamber, a longitudinally extending thread passage and a side delivery eye, a scroll extending forwardly in the longitudinal thread passage from a point adjacent the bobbin chamber, and aguiderib extending into the scroll from the side wall of the thread passage and between the ends thereof to guide the thread from the scroll to the side delivery eye.

2. An automatically threading loom shuttle having a bobbin chamber, a threading block having a. longitudinally extending thread passage, a bridge at the forward end of the thread passage, a scroll extending longitudinally of the thread passage from a point ad'acent'the bobbin chamber towards the ridge, and a thread guide extending transversely of the thread passage back of the bridge to guide the thread on its way from the bobbin chamber to the side delivery eye.

'3. An automatically threading loom shuttle having a bobbin chamber, a threading block having a longitudinally extending thread passage, a bridge at the forward end' of the thread passage, a scroll extending longitudinally of the thread passage from a point ad'acent the bobbin chamber towards the ridge, and a thread guide extending transversely of the scroll at a point back of the bridge to guide the thread in the thread passage as it is withdrawn from the filling carrier. t

4. An automatically threading loom shuttle having a bobbin chamber, a threading block having a longitudinally extendin thread passage and a bridge; at the forwar end of the, passage, a scroll extending from av point adjacent the bobbin chamber towards the bridge, and a thread ide in the thread passage back of the bridge for directing the thread about-an axis substantially in prolongation of the longitudinal axis of the bobbin as it is withdrawn therefrom.

5. An automatically threading loom shuttle having a bobbin chamber, a threading block having a longitudinally extending thread passage and a bridge at the forward end of the passage, a. scroll extending from a point adjacent the bobbin chamber towards the bridge, and a thread 'uide in the thread passage back of the bridge and extending into the scroll for directing the swirling thread about an axis substantially central of the longitudinal axis of the filling carrier'as it is withdrawn therefrom.

6. An automatically threading loom shuttle having a side delivery eye and a threading block provided with a longitudinally extending thread assage, a scrollin the thread passage, an

the swirling thread about the lon itudinal axis of the filling carrier as the t read is withdrawn therefrom.

7. An automatically threading loom shuttlehaving aside delivery eye and a threading block provided with a longitudinally extending thread passage, a scroll in the thread passage, a bridge frontward of the scroll, and a thread guide'between a convolution of the scroll and the bridge to direct the path of the thread as it is withdrawnfrom the filling carrier.

8. An automaticall threading loom shuttle having a longitudinally extending thread passage and side delivery eye, a scroll in the thread passage and a guide rib extending downwardly and transversely from the top of the thread passage to direct the thread and guard it from catching between the scroll and side wall of the thread passage.

In testimony whereof, I have signed my name to this specification.

HARRY A. DAVIS.

a thread guide extendmg into a convolution of the scroll to direct 

